Wrist-strap structure



`VJune25,1929." EEHERSCHEDE i 1,718,821

WRIST STRAP STRUCTURE Filed May 2e, 192e Edward Hersched' @11, @www 1 lfltbozweqdr.

Patented JuneV 25, 1929.

UNITED STATES EDWARD VF. HEB-SCHEDE, or CINCINNATI, onro.

WRIST-STRAP STRUCTURE.

Application filed May 26,

This invention relates to securing means for Wrist straps for use withWrist Watches and the like, and has for an object the provision of asimple and inexpensive adjustable securing means.

Another' object is to provide a structure of the class referred to Whichis simple and inexpensive to manufacture.

Another object is to provide a device of this kind wherein theadjustment of the securing means is simple, efficient, and easy ton'xanipulate.

These and other objects are attained by the means described herein anddisclosed in the accompanying drawings, in Which Fig. 1 is a perspectivevi eiv of a Wrist watch and straps having embodied therein a device ofmy 1nvention.

Fig. 2 is a cross sectional View on line 2--2 of Fig. 1.

Fig. 3 is a plan View of a plate forming a detail of my invention.

Fig. i is a similar view showng a modlied form of the plate.

A wrist Watch 5 is provided at its opposite ends with pairs of spacedlugs 6, between Which extend pins 7 which pass through loop portions 8and 9 formed on the ends of strap members 10 and 11, respectively. Thestrap member 11 has a perforation 12 and a com- Y municating elongatedaperture 13 terminat? ing at a distance from the end 111 of strap member11. The strap member 10 is provided with a series of spaced perforations15 which' are aligned with the elongatedaperture 13 in strap member 11.A stud indicated generally as 16 is adapted to be inserted in any of theperforations 15 and to be locked therein by a locking plate hereinafterdescribed.

Referring to Fig. 2 the stud 16 comprises a short cylindrical section 17of a length substantially equal to the thickness of strap mem. ber 10. Athin beveled or rounded flange 18 is adapted to abut the inner face ofstrap member 10 to preclude movement of the stud entirely through theperforations 15. The opposite end of the stud carries a flanged head 19of .such diameter as to permit it to be pz ssed through the perforation15. The shank 20, which carries the head 19, is of a diameter slightlyless than the Width of el oni j gated aperture 13, While the head 19 isof such diameter as to permit it'to be passed through perforation 12 instrap member 11. The shanlr 20 has a reduced portion 21 atb jacent thesection 17 whereby to provide a.

1926. Serial No. 111,864.

shoulder 22 on the shank and a shoulder 23 on stud section 17. A lockingplate Q4; may be of Vany suitable shape, and comprises a thin resilientwasher having a perforation Q5 therein which communicates With one edgeof the washer by a slightly reduced slot Q6. rFlic locking` plate 24k isof a thickness substantially equal to the distance bet-Ween shoulders Q2and 23 on the stud 16 and is adapted to be snugly receivedtl'iercbetween. The perforation 25 in the plate is of a diameter suchthat the reduced portion 21 of stud 16 will snugly lit therein. In orderto intcrloclz'thc parts as shown in Fig. 2 the tapered edges of thelocking plate 24 are positioned on opposite sides of thc reduced portion21 of the stud 16 and the locking plate is then forced toward the stud,the resiliency of the locking plate permitting sufficient spr iadingthereof to permit passage of the reduced portion 21 through slot 26 andinto the perforation 525 communicating therewith. As soon as the reducedportion 2l enters perforation 25 the tension on the locking plate isrelieved, whereupon the normal resiliency of the locking plate precludesaccidental separation of the parts.

As heretofore stated, thc shape of the locking plate 9A- may take anydesired form and should `be of a diameter such that it may assume anyposition about the stud 16 Without project ing beyond the body lines ofthe strap member 10. It is advantageous to provide one or more flattenededges 26 on the lockingl plate in order to facilitate mounting andremoval of the plate on and off of the stud. This may be accomplished byusing any suitable implement, such as a coin, which facilitates exertingand directing suitable pressure to force the locking plate onto and offof the stud.

The operation of the device is readily ap parent. The strap members maybe of any suitable material, While the stud and locking plat-carepreferably formed of metal. The thin rounded or flattened flange 18projects for such a slight dist-ance beyond the inner Wall of the strapmember 10 as to alford no discomfort to a wearer.

W'hat 1 claim is:

1 In a device of the class described, the combination of a perforatestrap member, a stud adapted to be passed through a perforation in thestrap, a flange on one end of said stud and having a diameter greaterthan the the perforations in the strap, the opposite end of the studbeing developed into a headed shank, a reduced portion on the shankintermediate the head and flange and disposed beyond the body of thestrap for providing a pair of opposed shoulders, one of said shouldersbeing disposed in a plane with one face of the strap, a resilientlocking plate having a perforation therein of a diameter substantiallyequal to the reduced portion of the shank and having a 'reduced slotcommunicating with one-edge of the locking plate, the resiliency of thelocking plate permitting spreading thereof, whereby the reduced portionof the shank may be passed through the restricted slot therein and intothe perforation "for positioning the locking plate in abut-- mentWiththe opposed shoulders of the stud whereby the 'stud andv stra-p aresecured against separation.

Q. In ay Wrist strap member the combination ot a strap having spacedperforations therein, a stud having a flange at one end thereof forabutment with one side of the strap member, a cylindrical sectionextending fro'm the flange and adapted to seat in and fill a perforationin the strap with the remainder ot the body ot the stud projecting fromthe opposite side of' the strap, said projecting portion having anannular Agroove for -provi ding a pair of opposed shoulders on the 'studexterior-ly of the strap, one of said shoulders being disposed in aplane lwith vthe last mentioned side ofthe strap, a slotted lockingplate seating in the groove in the stud and retained againstlongitudinal movement by the shoulders, the strap being secured betweenthe flange and one face ot' said locking plate, and a head on the 'freeend of the stud, said head and the locking plate serv` ing to receive`between them a second slotted strap. y

3. In combination a stud having'a head and a flange at its loppositeends, said stud being adapted for mounting in a perfor-ate strap Yandhaving an annular groove spaced from the head `and flange whereby toprovide a pai-r of opposed shoulders, and a slotted locking platereceived in the groove and retained against movement vlongitudinally ofthe stem nby said shoulders and serving to tixedly position the stud onthe perforate strap.

t. In a device of the class described the combination of a perforatestrap member, a stud extending through the perforation in the strap, aflange on one end of the stud and abutting` one side of the strap, theopposite lend ot the stud being developed into a headed shank, saidshank having an annular groove therein providing a pair of opposedshoulders, a plate having a slot therein adapted to seat in the annulargroove and to be retained against longitudinal movement by saidlshoulders, said plate serving to bind the strap against the flange.

5. In a device ot the class deserilwd the combination ot a pertoratestrap. a flanged stud extending through the perfm'ation in the strap andhaving an annular groove intermediate its ends whereby to provide a pairot opposed slmulders, a slotted plate seated in the groove and retainedagainst longitudinal movement on the stud by said shoulders and servingto retain the strap in abutment Awith the flange.

6. An adjustable stud tor wrist straps and the like comprising a Hangedstud adapted to be passed through a strap, said stud having an annulargroove intermediate its ends providing a pair of opposed shoulders and alocking plate insertable in said groove and retained againstlongitudinal displacement b v said shoulders, said plate and flange onthe stud serving to bind a strap between them.

7. In a device of the class described the combination of a perforatestrap, a flanged .stud having an annular groove intermediate its ends,the stud extending through a perforation inthe strap with thetlange inabutment with one side of the strap, sa id groove providing a pair ofopposed shoulders, anda locking plate slidably mounted in the groove andtixed against longitudinal movement by said shoulders, said plateserving to bind the strap between the flange and the plate.

In testimony whereof, I have. hereunto subscribed my name this 22nd dayot May, 1926.

EDVARD F. HERSCIIEDE.

